23.—(1) Any payment made in respect of any year by a local authority of an allowance under section 47 of the 1973 Act in the nature of an attendance allowance to a member who is a councillor is conditional on the aggregate amount which the local authority in question has paid or is liable to pay for that year by way of—
(a)such allowances; and
(b)allowances under a scheme made by the local authority under Part II;
(c)allowances under a scheme made by a joint board under Part IV; and
(d)allowances under section 49A of the 1973 Act,
not exceeding the amount ascertained as mentioned in regulation 13(a) as respects that authority.
(2) In any case to which paragraph (1) does not apply, any payment of an allowance under section 47 of the 1973 Act in the nature of an attendance allowance shall not exceed £22.80 for any period not exceeding 24 hours; and for this purpose a period of 24 hours shall be deemed to begin at 3am.